2005 TOYOTA AVENSIS Service Repair Manual

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Page 657 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual ± DIAGNOSTICSECD SYSTEM (1CD±FTV)
05±593
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0115 ENGINE COOLANT TEMPERATURE CIRCUIT
DTC P0117 ENGINE COOLANT TEMPERATURE CIRCUIT
LOW INPUT
DTC P0118 ENGINE COOLA

Page 658 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A81000
ECM
THW E2
19
E13
28
E13
L
W
1 2
E2
Engine Coolant Temp. Sensor
5V
R
BR
B±W
2
EC1
1
EC1
05±594
±
DIAGNOSTICS ECD SYSTEM(1CD±FTV)
AVENSIS REPAIR MANUAL (RM1018E)
WIRING DIAGRAM
INSPECTION

Page 659 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A75743
Engine Coolant
Temp. SensorECM
A76786
Wire Harness Side
Engine Coolant Temperature
Sensor ConnectorE2
A75742
Engine Coolant
Temp. Sensor
ECM
A80457
THW
E2
E13
ECM Connector
±
DIAGNOSTICS EC

Page 660 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A75766
Engine Coolant
Temp. SensorECM
A75744
Engine Coolant
Temp. SensorECM
A80458
E13
ECM Connector
THW
05±596
±
DIAGNOSTICS ECD SYSTEM(1CD±FTV)
AVENSIS REPAIR MANUAL (RM1018E)
4READ VALUE OF

Page 661 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual ± 20 0 20 40 60 80 100
(± 4) 32 68 104 140 176 212 30
20
10
5
3
2
1
0.5
0.3
0.2
0.1
A67628
Acceptable (Fig.1)
Resistance K
Temp. C (F)
± DIAGNOSTICSECD SYSTEM (1CD±FTV)
05±589
AVENSIS REPAIR M

± 20 0 20 40 60 80 100
(± 4) 32 68 104 140 176 212 30
20
10
5
3
2
1
0.5
0.3
0.2
0.1
A67628
Acceptable (Fig.1)
Resistance K
Temp. C (F)
± DIAGNOSTICSECD SYSTEM (1CD±FTV)
05±589
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0110 INTAKE AIR TEMPERATURE CIRCUIT
DTC P0112 INTAKE AIR TEMPERATURE CIRCUIT LOW
INPUT
DTC P0113 INTAKE AIR TEMPERATURE CIRCUIT HIGH
INPUT
CIRCUIT DESCRIPTION
The intake air temperature sensor is built in the mass air flow
meter and senses the intake air temperature.
A thermistor built in the sensor changes the resistance value
according to the intake air temperature.
The lower the intake air temperature is, the greater the thermis-
tor resistance value becomes, and the higher the intake air tem-
perature is, the lower the thermistor resistance value becomes
(See Fig. 1).
The intake air temperature sensor is connected to the ECM
(See below ). The 5 V power source voltage in the ECM is ap-
plied to the intake air temperature sensor from terminal THA
(THAR) via resistor R.
The resistor R and the intake air temperature sensor are con-
nected in series. When the resistance value of the intake air
temperature sensor changes in accordance with changes in the
intake air temperature, the potential at terminal THA (THAR)
also changes. Based on this signal, the ECM increases the fuel
injection volume to improve the driveability with a cold engine.
DTC No.Proceed toDTC Detection ConditionTrouble Area
P0110Step 1
Open or short in intake air
temp. sensor circuit for 0.5
sec. (1 trip detection logic)
P0112Step 4
Short in intake air temp. sen-
sor circuit for 0.5 sec.
(1 trip detection logic)Open or short in intake air temperature sensor circuit
Intake air temperature sensor (built in mass air flow meter)
ECM
P0113Step 2
Open in intake air temp. sen-
sor circuit for 0.5 sec.
(1 trip detection logic)
HINT:
After confirming DTC ºP0110, P0112 or P0113, use the hand±held tester to confirm the intake air tempera-
ture from the ºDIAGNOSIS / OBD/MOBD / DATA LIST / ALLº.
Temperature DisplayedMalfunction
±40C (±40Open circuit
140C (284 Short circuit
05CPL±01

Page 662 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A72925
BR
G±R
28
31
E13 THA
E2 ECM
1 2
A6
Intake Air Temperature Sensor
(Built in Mass Air Flow Meter)
E135V
R
THA
E2
05±590
±
DIAGNOSTICS ECD SYSTEM(1CD±FTV)
AVENSIS REPAIR MANUAL (RM1018E)
WI

Page 663 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A75743
ECM
Mass Air Flow
Meter Connector
A54396
E2
THA
Wire Harness Side
Mass Air Flow Meter Connector
A6
A75742
ECM
Mass Air Flow
Meter Connector
A80455
THA
E2
E13
ECM Connector
±
DIAGNOSTICS ECD

Page 664 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A75766
ECM
Mass Air Flow Meter
A75744
ECM
Mass Air Flow Meter
A80456
E13
ECM Connector
THA
05±592
±
DIAGNOSTICS ECD SYSTEM(1CD±FTV)
AVENSIS REPAIR MANUAL (RM1018E)
4READ VALUE OF HAND±HELD TESTE

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